Saw-gumming machine



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. R. W. MCLEAN "SAW GUMMING MACHINE l0 Sheets-'Sheet 1 Filed July 26. 1.922

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Filed July 26, 1.922 10 Sheets-Sheet 5 R. W. MCLEAN SAW GUMMING MACHINE Filed July 2e,

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R. W. MGLEAN SAW GUMMING MACHINE rFiled July 26, 1922 lO Sheets-Sheet 9- R. W. MCLEAN SAW GUMMING MACHINE Filed July 26,1922 L 1o Sheets-Sheet 10 *do M134? x11/w @Z525 1&2@ 76 Kl' l l@ 165i 3% w My Y lf3@ Patented @et 23, i923.

STATES htdlll PATENT @FFHQFN ROBERT W. MCLEAN, OF BRDG-EVVATER, i/IASSACHUSETTS, ASSIGNOE 'EO CARVER COTTON GIN COIVIPANY, OF EAST BRDGEXATER, MASSACHUSETTS, .A CORPORA- TION OF MASSACHUSETTS.

SAVLGUMMING MACHINE.

Appcaton filed July 26, 1922.

To all 'zu/tom tmdg/ concern.'

Be it known that l, Ronnn'r TN. MoLnAN, a citizen of the United States of America. and resident of Bridgewater, in the county of Plymouth and State of Massachusetts, have invented new and useful improvements in Saw-Gumming Machines, of which the following,` is a specification.

rlhis invention concerns z saw gumming machines and relates more particularly to machines for gummingthe teeth of fin saws by means of rotating dis; tiles.

`When a cotton gin is working at vfull capacity, it is necessary to gum the saw teeth at frequent intervals, but unless eXtra saw cylinders are provided, the gin must stand idle during the gumming` operation, and as it is not ordinarily feasible to provide the requisite number of extra saws, it is manifestly desirable, so far as possible, to reduce the time consumed in the gumming of the saws. Although mechanical means have heretofore been devised for carrying' out the gummingoperation and have been more or less successful for the intended purpose, they have not, so far as is known, been capable of reducing` the time consumed in the gumminojI operation to the desired extent, and furthermore, in many cases, are of complicated and delicate construction, or require almost constant supervision. The workmen available in ginning mills are not ordinarily possessed of high mechanical skill nor can they usually be relied upon to supervise the operation of the ordinary gumming machine with the requisite care, so that. complex mechanisms7 requiring many and accurate adjustments find little favor with; the trade, and on the other hand, those devices which, though of simpler form, necessitate constant supervision for their proper operation, frequently fail to give adequate service, or actually damage the saws by reason of the unreliability of the human element involved.

The principal object of the present invention is accordingly to provide a gumming machine for gin saws which is fully automatic in operation and capable of rapidly completing the entire operation of gumming the saws of a saw cylinder after once being* setin motion; which will stop automatically at the completion of the gun- Serial No. 577,577.

ming operation; which can be set up for operation upon a fresh saw cylinder: with a minimum expenditure of time and trouble; and which is of relatively simple design, durable construction and capable of operation hy relatively unskilled labor.

Further objects are to provide forv the ready removal of individual files for replacement; to permit of the withdrawal of the saw cylinder from the tiles, if it be desired to do so during' the gumming operation and its restoration to operative position while maintaining the angular relation of the saws to the tiles unchanged; to provide for the accurate entrance of the les into the tooth spaces while opposing` any tendency of the files to bite too deeply, with consequent damage to the saws; and to pro-- vide for accurately and positively moving the saw cylinder into operative position and for holding' it securely in such position after being brought into operative relationship to the files.

In the accompanying drawings there is illustrated by way of example. one specific form of mechanism which well exemplies the various mechanical arrangements of parts by means of which the above objects might be attained.

Fig. l is a side elevation of the machine, viewed from the left side thereof;

Figs. 2 and 2b are rear elevations of the left and right hand portions of the machine, respectively Figs. 3 and 3b are plan views of the left and right hand portions of the machine respectively F ig. 4 is an elevation of the right hand side of the machine;

Fig. 5 is a vertical, transverse cross section on a line suoli as 5-5 of Fig. 8a;

Fig', 6 is a similar cross section on the line 6 6 of Fig. 3a;

,Fig 7 is a similar cross section on the line 7-*7 of Fig. 3b;

Fig. 8 is a fragmentary longitudinal cross section on the line 8-8 of Fig. 3a;

Fig'. 9 is a fragmentary longitudinal cross section on the line 9-9 of Fig. 3a;

Fig. 10 is a fragmentary plan view, partly in section, showing details of the means for supporting' the saws against the lateral thrust of the files.

" ing shown in the position they occupy immediately after the first shift; p

Fig. 17 is a rear elevation of the shift controlling cam;

Fig. 18 is an elevation of said cam, viewed from the right side; and

Fig. 19 is a detail of a connecting'block forming a part of the mechanism of Fig. 14.

Referring to the several figures of the drawings, the machine is shown as comprising a pair of end frame members 1, 2,'having substantially horizontal uppersurfaces 8, 4, respectively, upon which certain of the operative devices of the machine are niount-V ed. These end frames are preferably formed as castings, and are secured in properly spaced relation by a series of rods, 5, 6, 7, 8,

kextending from one end frame to the other and secured thereto by means of nuts engaging threaded end portions of such rods. Mounted upon the rear part of each end frameis a supporting bracket 9, 10, respectively, and secured to the tops of said brackets are a pair of channel bars 11, .12, (Fig. the channels of such bars facing rearwardly and forwardly respectively and providing between them a space 13. These bars extend from side to side of the inachine and atA the left hand side extend beyond the frame member 1. A pair of brackets 14, 15, are mounted upon the bars 11, 12 at the overhanging portion thereof, such brackets providing bearings 16, 17 respec-V tively (Fig. 8) in which a main drive shaft 18 is mounted to turn. Mounted upon this driving shaft, between the brackets 14, 15, is a loose pulley 19 and a fixed pulley 20, such pulleys being adapted to be driven by a belt B from any desired source of power. Adjacent to the fixed pulley 20 and to the right thereof, as viewed from the front of the machine, is a pinion 21 also fixed to the shaft. y

To the right of the bracket 15 a sleeve 22 is mounted upon the shaft to rotate freely thereon and fixed to this sleeve is a gear 23 and a cam disk 24, such disk being provided with a'peripheral cani groove 25. Except for a lateral offset at 25a, of relatively small angular extent, this groove lies in a plane perpendicular to the shaft. The bracket 15 bearings. lVhere the shaft passes through the bearings 27 it is surrounded by a sleeve 8OfL (Fig. 9) having a pinion 31 secured thereto at the right of the bearingand a gear 32 fixed thc-reto at the left of the bearing Y 'the pinion 81 meshes with the gear 23 car` ried by the sleeve 22, as above described, while the gear 82 meshes with the pinion 21 fixed to the drive shaft. The sleeve 30, on which the pinion 32 is mounted, is splined to the shaft 30, permitting the latter to slide freely therethrough but rotating the shaft when the gear i2 is turned. Vliththis arrangement it is evident that the shaftBi) will be rotated oppositely to the main drive shaft and at a reduced speed, while the cam disk 24 will be turned in the same direction as the drive shaft and at still slower speed.

To the right of the cam disk'2f-1, a bracket 33 (Fig. 24) is secured upon the bars 11, 12, such bracket providing a bearing 34 in which the right hand end portion of the main drive shaft 18 turns. This bearing is enlarged to form a housing 35 (Fig. (L) within which is arranged a worm 36 fast upon the main drive shaft and which meshes with a worm wheel 37 arranged'witlr in a housing 38 integral with the housing 86, such worm wheel being inixed to the upper en d of a vertical shaft 89. This shaftV turns in an upper bearing 40 carriedby the bracket aniilrinispaced lower bearings 41, 42, carried byv a bracket secured to the lower surfaces of the bars 11, 12. Between the bearings 41'find 42 a housing 44 is; provided within which is arranged a worm 45 secured to the shaft 49 and meshing'with a worin wheel 46 disposed within a housing 47 projecting rearwardly from the bracket 48, such wheel being fixed to a shaft 4S. This shaft 48 turns in aligned bearings '49, 50 (Fig. 2L) carried by the bracket 43 and iS supported at its right hand end in the bearing 51 (Fig. 2b) carried by a bracket 52 also secured to the under side of therails 11, 12. he shaft 48 projects to the right beyond the bearing 51 and has secured thereto a sprocket wheel over which a sprocket chain 54 is trained. This chain alsopasses about a sprocket wheel carried by a shaft 56 supported at its right hand end portion in a bearing 57' carried by a depending bracket arm 58 secured to the rails 11, 12. At its right hand end theV shaft 56 passes through a journal opening in a bearing boss 59 in the end frame member 1, and has a gear wheel 60 fixed to its outer extren'iity,"

the hub of such gear being spaced from the bearing 59. A supporting arm 61 is 'jour naled upon the shaft 56 between the bearing 59 and the hub of the gear 60, such arm having a boss 62 (Figs. 1 and 2?) at its outer extremity in which is secured a pin 63. This pin forms a pivot upon which a pinion 64 is journaled, such pinion meshing with the gear 60 in all positions of the arm 61 and also meshing with a largev gear 65 mounted upon the saw supporting shaft as will hereinafter be more fully described. A collar member 67 is pivotally supported upon the right hand end of the pin 63, such collar member having a rod 68 which eX- tends forwardly and upwardly and is adapted to contact with the front side of the peripheral surface of the hub 66 of the gear 65. This arm 68, with the member 69, serves constantly to maintain the pinion 64 in engagement with the gears 60 and 65 regardless of the position of the support upon which the latter gear is mounted.

Extending to the right from the bracket 33 (Fig. 2a) is a bearing 70 in which is journaled the left hand end of an axially slidable rock shaft 71. The right hand portion of this shaft is supported in a bearing 72 (Fig. 2b) carried by a bracket 7 3 mounten upon the rails 11, 12, the shaft also being supported at an intermediate point by a bearing 74 carried by a bracket 74 carried by the rails. Mounted upon the shaft 71 are a pluralityof brackets 75, 76, 77, such brackets being secured to the shaft by means of set screws 78. These brackets comprise the horizontal arms 79, (iFigs. 3a and 3b) 80, 81 respectively of like construction, each arm being divided at its forward edge to form a plurality of spaced lingers 82. These brackets are also provided with vertically arranged arms 83, 84, 85 respectively, the lower ends of the several arms, as indicated for example in Fig. 12, being furnished with screw threaded bores for the reception of threaded pins 85a upon which turn rollers such as 86. These rollers bear against the forward faces of plates 87 secured to blocks 89 projecting upwardly from between the rails 11, 12, the engagement of the rollers with the plates serving to support the horizontal arms of the brackets in proper position, while also permitting such brackets to move lengthwise of the machine with the shaft 71.

Upon the shaft 30 a series of bevel gears 90 is arranged 3a and 11), each of the gears being lixedly secured to the shaft bv means of a set screw orpin. The several gears are spaced apa-rt to provide for brackets 91 suspended from the shaft and interposed between adjacent gears. To each of the brackets 91 a frame 92 (Fig. 11) is se` cured, such frame providing upper and lower bearings 93, 94 respectively. In the upper bearing of each frame the elongated hub of a pinion 96 is arranged to turn. A vertical shaft 95 is splined to such hub t0 turn therewith but being movable axially with respect thereto, such shaft passing through the lower bearing 94 and lia-ving a collar 97 secured thereto. This collar is ar` ranged above the upper bearing and serves to limit downward movement of the shaft. Each pinion 96 meshes with one of the bevel gears 90 and is driven thereby. The lower end of each shaft 95 is provided with an internally threaded bore for the reception ot a bolt 98 by means of which a. disk file 99 may be secured to the lowerend of the shaft.

To the rear of the shaft 30 each o-f the horizontal arms 79, 80, 81 respectively of the brackets 75, 76, 77 is provided with a pin 100 (Fig. 11) upon which a yoke 101 is pivotally secured. rod 102 has screw threaded connection with each of said yokes, such rods being secured to a longitudinally extending bar 103 and serving to support the latter. This barl 103 is provided at its rear edge with a series of pairs of spaced opstanding ears 104 (Figs. 3 and 14), such ears each being provided with an upwardly opening slot To each of the brackets a. rod 10G (Figs. 11 and 14) is secured by means of a pin 107, the forward ends of such rods entering openings 108 in the frames 92, while the rear ends of the several rods are provided with slidable bocks 107 having laterally projecting pins 108 fixed therein. ythe oppositely projecting ends of such pins are arranged to engage within the slots 105 in the ears 104 of plate 103. The ends of rods 106 are preferably screw threaded for the receptie-n of nuts 107a serving to prevent the blocks from escaping from the rods. Each of the rods 106 is siurounded by a coil spring 109 bearing at one end against the block 107 and at its other end against the enlarged forward end of the rod. such springs tending normally to swing the frames 92 forwardly with respect to the plate 103. Secured to the lower face of the latter plate is an angle bar 110 provided with four pairs of downwardly and rearwardly projecting ears 111, and having a bar 112 secured to the forward face of its depending flange. Extending forward from theI bar 112 are pairs of arms 113 (Fig. 11) the arms of each pair having oppositely directed bosses 114 adjacent to their extremities, such bosses normally engaging substantially Hat vertical surfaces 115 of bosses projecting from the opposite sides of the bearing 94 of each frame. The arms 113 thus serve as guides for the fra-mes 93 as the latter oscillate about the axis of and 14) the several rods extending rear wardly between pairs o1' pins 117 upstanding from the top surface ot' the channel bar 12. Three oft the rods 116 are pivotally secured at their rear extremities to arms 118,119, 120 (Figs. 8 and 3b) respectively of tiie bell crank levers ulcrumed upon pins projecting upwardly *from the channel bar 11. Tie connections et the 'fourth rod will be described hereinafter. The other arms of such bell crank levers are )ivotally connected at the points 121, 122 and 123 respectively tefa longitudinally slidable bar rllhis bar 124; is suitably guided in bearings carried by vthe channel bars 11, 12 and at its lett hand extremity is conn -cted by means olf a pin 124: to a slide block 125. This slide block 125, as indicated more particularly in Figs. 3" and 5, is mounted in a suitable guideway innnediately beneath the cani disk 21 and is provided with a hollow pivot jin 126 upon which a cam roll 127 turns. This roll 127 engages the cam groove 25 of the cam disk 21,1,aiid by reisen el' the contour oil the cum groove, the cani roll with the slide block is constrained at intervals to reciprocate longitudinally of the machine. Preferably the hollow pivot pin 126 communicates with a pipe 128 which is turned upwardly at its rear end and serves as an oil reservoir whereby the cani roll 127 may be properly lubricated.

At that portion of the shaft 71, which lies between the bearings 72 and 74g (Figs. 2b, 15 and 16) the upper surface or such shaft is provided with three. sets 130, 181, and 132 ol three ratchet teeth each. The ratihetteeth 136 coojfierate with a. retaining pawl 13% pivotally supported between a pair o'l ears 185 carried by the bearing); 72. A stop pawl 136 is arranged to cooperate with the teeth 182, such pawl ,being pivoted'between a pair 0l' ears 137 upstanding from the bearing' 74. A spring 138 tends normally to depress the stop pawl 136. As may be seen in TFigs. 3" and 16, the stop pawl of a width substantially greater than the diameter of thefshaft 71 and the opposite ends such pawl are adapted normally to rest upon substantially lat upper 'faces of bosses pro] ectingr upwardly from a pair of links'1397 1110 respectively. Theser links are pivoted at 14:1

to opposite sides o1 the bearing` 741-, theA other ends of such links being pivotally connected to links 1113, 141 respectively. The latter links, at` their right hand ends, are pivotally secured to a collar 1415 slidable along the shaft 71, such collar having a pair vof upstaiiding ears ,V1/16 between which a drivingpawl 1217 is pivoted, the latter pawl being engageable with the ratchet teeth 131. Y o The pivot--pins 14129 1412*), by means ol' which the links of each pair are connected, are secured respectively to the front and rear sides ol a yoke member 1118 Y (Figs. 7 and 15). This yoke member is pivotally secured Vby means of a pin 149 to ablock h'avingscrew threaded connection with the upper end of a rod `150, such rod extending` o downwardly through an opening in a plate 151, secured to the upper surfaces of the bars 11, 12, and between such bars where it is; surrounded by a coil sprinv' 152. The lower end of such spring rests upon a flange 153 outstandingY from the rod 150 thus norinallyrtending to depress the rod. The lower portion 1511 o1 the rodpasses through athreaded sleeve 155 having,` a head 156 whereby it may be turned. The screw threaded portion of such vsleeve engages a threaded opening in a bracket membei1 158 carried by the lower edges of the bars 11, 127 the upper end of the sleeve constituting an adjustable. stop, iter limiting downward movement of liange 153. 'llie rod 150 is connected at its lower end to a yoke member 159, such yoke member having! laterally spaced arms between whiehan anti-V frietion roller 160 (Fig. 7) is journaled. At its lower end this yoke secured to a guide rod 161 passing through an opening in the bearing 162 carried by the rear arm 163 of a bracket 164. This bracket is provided with a journal opening,` through which passes the shaft .56 and with a second journal opening," through which a shaft 165 passes, the latter shaft beingmounted at its opposite extremities in bearing openings in the end frame members. Y

VIA.fin arm 166 projects rearwardlyl'rom the bracket 15S and is provided witha pin 167 upon which a lever 168 is pivotally mounted. At its lower end this lever is pivoted at the point 169 to an arm 170 havinga substantially flat surface 177 for engagement with the roller 160, and being provided adjacent to its forward extremity' with a cam Aengagging shoe 172 (Figs. 17 and 18). which rests upon the peripheral surface ot'a cam 173 lixedly mounted upon the shaft 56. This .cam 178 comprises a substantially concentric Ycircular portion 17117 followed by an abrupt and substantially radial shoulder 17 5 from the inner end of which extends an incline 176 leading gradually outwardlyY to the peripheral surface 174iot the cam.

The upper end of the lever 168 (Fig. 7) is provided with an internally screw threaded bore for theI reception' of a shouldered bolt 177 upon which a roller 178 is mounted to turn. This roller engages a slot.;17 9 in the rearwardly extending a'rin 180.01 a bell crank f ed at 181 with the bar 12e and as the latter rcciprocates such bellv crank lever is caused to oscillate about its pivot. The bell crank lever is also provided with a laterally eX- tending arm 180b to which the rear end of the fourth rod 11G is pivotally secured, the forward end of such rod heling joined to the bar 110 in the same manner as are the rods 11G which are connected to the lever arms 1181 119, 120.

Projecting rearwardly from the bracket 14 is a bearing 182 (Figs. 2a and 8a) and a similar, aligned bearing 1821L projects from the brac :et 15. Additional bearings 183 and 184i are also provided in alignment with bearings 182 and 1821. A belt shipper rod 185 is arranged to slide longitudinally in the several bearings just described. This belt shipper rod is provided with an adjustable collar 186 spaced from the left. hand side of the bearing 183, and between such bearing and collar a coil spring 187 is arranged, such spring surrounding the shipper rod and tending normally7 to move such rod to the left. djacent to its left hand extremity7 the shipper rod is provided with shipier arnis 187 arranged to engage the edges et the belt B and to move the latter from one of the pulleys to the other. At a point somewhat to the left of the bracket 76, the shipper rod is provided with a latch pin 188 with which engages a latch 189 (Figs. 2, 3h and pivotally supported upon the rear face of bracket 190 carried bythe bar 12. An actuating arm 191 extends upward from the latch 189 and serves as a means for rocking the latter whereby to disengage it from the pin 188. This arm 191 normally lies somewhat to the left of the bracket 76 but is arranged in the path of the latter' so that as such bracket moves to the left during the operation of the machine, it comes into contact with the arm 191 and automatically disengages the latch thereby permitting the spring 187 to shift the r d 185, thus moving the belt from the fast to the lose pulley.

At the rear of the machine adjacent to the right hand end thereof, a. lever 192 having a handle 198 is pivoted at 1911 to a bracket 195 carried by the rear channel bar 11. At an intermediate point, this lever is provided with a slot 196 through which passes a belt 197 secured to a sleeve 198 iixed to the shipper rod 185. By means of this lever, the shipper rod may be m ved to the right in opposition to its spring 187, for restarting the machine.

A lever 199 provided with a handle 200 .is pivotally connected to the bracket 77, the set screw 78 being suitably formed to pro- *ide a pivotal bearing for the lever. The lower end. of the lever 177 is forked as indicated at 201. for engagement with a pin 202 fxedly secured and proiecting rearwardly from the plate 87. By means of this lever the bar 71 may be moved to the right in restarting the machine.

A saw carrying shaft is indicated at 203 (Fig. 3a) such shaft being provided with a series of saws 204 in the usual manner, and havingthe gear secured to its left hand end during the operation of the machine. This saw shaft rests in a pair of cradles 205 arranged respectively at the opposite sides of the machine. These cradles are mounted upon supports 206 (Fig. 5) of substantially like form and each provided with an inclined shoe 207 engaging an upwardly and rearwardly inclined surface 208 of a bracket 209. The brackets 209 are mounted upon the end frame members 1, 2, respectively. The supports 206 are yeach also furnished with forwardly and downwardly directed rods 210`r the lower ends of which are slidable within bearings 211 formed in the brackets 209. These rods are screw threaded at an intermediate portion of their lengths for the reception 0f internally screw threaded worm wheels 212 constituting nuts for engagement with such rods. Each ofthese worm wheels engages a worm 213 carried by a shaft 2141 which extends transversely of the machine and the ends of which are journaled in the respective brackets 209. At the right hand end of the machine this shaft is furnished with a crank 215 whereby it may be turned, thus simultaneously turning the worms 213 and worm wheels 212 and causing the support-s 206 to move upwardly and rearwardly, or downwardly and forwardly as may be desired. in order to adjust the saw shaft vertically to bringl the saws into proper operative position withA rela-tion to the files. As the saws are gradually reduced in diameter due to wear, the position of the cradles may be changed so that the pitch of the saw teeth as they are cut away by the gummer files will not be varied.

The brackets 209 are slotted in a front to rear direction. as indicated at 216 for engagement with bolts 217 projecting uD- wardlv through the end frames. The brackets 209 are thus permitted to move forwardly and rearwardly in a horizontal direction relatively to the end frames for bodily moving the Saw shaft into and out of operative position.

Proiecting from each of the brackets 209 is a pin 218 (Fig. 7) to which the forward end of a link 219 is secured. The rear end of each link is pivotally connected to the rear end of a rocker lever 120 (Figs. Il. 2a and 2b) iixedly secured upon the shaft 165. At the right hand end of the machine. a forwardly extending arm 220a is secured to the mid of shaft 165. outside the frame member 2. said arm having a pivot pin 221 to which the upper end of a link 222 is secured. The .lower end of such link is pivoted at 223 to the lower end ofY alever 224, said lever having an upwardly extending arm 225 provided with a handle 226.

Projecting forwardly from the plate 112 are a plurality of brackets 227 v(Fig. 10) serving to support a shaft 228 upon which a plate 229 is mounted. rThis plate is provided with a series of forwardly extending arms 230 provided with bosses 231 adapted respectively to engage one side of each of the saw blades 204 to suppe-rt such blade against the lateral pressure of the file. If desired, suitable guard members 232, such as indicated by way of example in dotted lines in Fig. 6, may be provided for protecting the operative mechanism from dust and dirt and for reducing the danger of injury tol the workmen.

TheA operation of the machine is substantially as follows, it being assumed that the machine has just been stopped at completion of the operation upon a saw cylinder. For removing the completed saw cylinder from Athe machine, the operator grasps the handle 226 and draws the latter forwardly, thereby causing the supporting brackets 209 tov slide forwardly upon the end members of the frame. This movement of the brackets carries the saws out of the range of Vthe files but does not disengage the gear 65 from the driving pinion 64, the latter being 'constrained to follow the movement of gear 65 by the rod 68 with its depending arm 69. The gear 65 is now removed from the saw shaft and the arm 68 is lifted, thereby permitting the saw shaft to be removed from its cradles. A new saw shaft having a fresh set of saws to be gummed is now f placed in the cradles, the gear 65 is secured in position upon the shaft, and the arm 68 is dropped into operative position, holding .the pinion 64 in mesh with the gear 65.

Either before or after the mounting of the saw shaft in its cradles, the operator moves the handle 199 to the right thereby causing the shaft 71 to slide longitudinally to the right, the pawls 134 and 147 being manually lifted during such movement. At the completion. of this movement, the pawl 134 rests y upon the upper surface of the shaft 71 just to the left of the last tooth of group 130, the pawl 137 rests upon the upper surface of Y Athe shaft 71 just to the left of the left hand ratchet tooth of the group 131,while the stop pawl 136 engages the left hand tooth of group 132. At this time the shoe 173 engages the inner part of the cam incline 176. The operator now moves the saw cylinder rearwardly by manipulation of the handle 226. The arrangement of the levers 219 and 220 is such that the pivotal connection of the lever 219 to the arm 220 is substantially Ain valignment with the aXis of shaft 165 and with the pivotal connection 218 of the lever 219 to the bracket 209. The toggle ar moved forwardly merely by manipulation of the lever 225.

ln the machine as herein disclosed, a file 99 is providedfor each group of three saws upon the saw shaft, and in starting the machine each file is in position t-o engage a tooth of the right hand saw of its particular group. The operator now swings the lever 193 to the right, thereby moving the belt shipper rod 185 to the rightk and bringing its pin 188 into operative engagement with the latch 189 which serves to hold such rod in operative position, the spring 187 being placed under compression during the above described movement of the rod. The movement of the belt shipper rod to the right serves to carry the belt B from the loose pulley 19Vto the fixed pulley 20, the. parts now occupying the position indicated in Figs. 2a, 2b, anc 3, 3". 'As soon as the drive shaft 18 begins to rotate, the shaft 30 is also rotated through the reduction gearing comprising` Athe pinion 21, gear 32 and pinion 31, while at the same time the cam disk 24 is also rotated, but at a speed still. slower than that of the shaft 30,*by means of pinion 31 and the gear 23. The worm 36 is also rotated with the drive shaft, thus, by means of the worm wheel 37, the worm 45, and the worm wheel 46, rotates the shaftV 152 under compression, and at the same time, by means of the links 139, 143,140, 144, causing the sleeve 145 to move to the right until the pawl 147 drops into the left hand tooth of the group 143 at which time the links of each pair are substantially in alignment and the stop pawl 146 is lifted, by engagement with the links 142 and 144out of engagement with the left hand tooth of the gro-up 132. Cam shoe 172 now rests upon the circular peripheral surface of the cam 173 which occupies substantially threefourths of the circumference of the cam.

During the above described movement o-f the cani 173, the cam disk 24, having the cam groove 25, acts atintervals vto recip rocate the bar The rec-iprocatio-n of this bar in a. longitudinal direction is transmitted by means of the bell crank levers 118, 119, etc., to the rods .116`and thence tothe swing frameV comprising the members 103, 110 and 112. The oscillating movement of this frame 9 about the axis provided by the aligned pins 100 is transmitted to the file carrying frames 92 through the several coil springs 109. rThe frames 92 are thus compelled to oscillate abo-ut the axis of the shaft 30 while at the same time the rotation of shaft 30 causes the gears 90 to turn, thereby driving the pinions 96 carried by the lilo shafts 95 and thus causing such shafts to turn. The tile disks 99 are thus rotated while being` resiliently forced against tho edges of the saw blades.

T ie arrangement of the parts is such that the reaction between the gears 99 and their corresponding pinions 9G opposes the action of the springs 199 which normally tend to swing the Jtrames 92 forwardly. Increased resistance to rotation of the tiles is then compensated tor by the increased rearward component ot the driving` force, so that any tendency ot the tiles to bite into the saws to an undesirable extent is prevented. rllhe con-- tour of the cam groove is such that duringl the engagement ot the tiles with the saws,up on the forward oscillation o't theiiletramcs, sulicient time is permitted for the proper gumming` oft the lsaw tooth. During the interval in which tile trames are moved to the rear, the saw is turned an amount substantially equal to the distance between the-teeth by the driving mechanism including` the gear 69, the pinion 64 and the `near 65. is there is some back lash between such (rivinp` `gears, however, the forward oscillation ot the tile frame serves by engage-ment ot' thel .tiles with the next succeeding aw vvtooth properly to center the files with respect to such teeth, the proper finding' ot the saw teeth by the i'iles being facilitated by the fact that the tile discs are free to move vertically to a limited extent, the provision of the resilient connection between the` driving' frame and the .tile trames 'further assistingy the several tiles to tind the proper saw teeth automatically and without necessitat. ina such accurate timing;- ot the parts as otherwise might he necessary. vThe springs 109 also determine the pressure ot the files against the saws, and in vie-w orP the charactor o't` the labor employed in operating; such machines.. it is found preterably to pro-- vide springs 109 of a suitable tension 'ter the work in hand, and to omit anyfmeans by which the operator might improperly vary such in'edetermined tension. lt is, of course possible and is contemplated that springs of other tension may be provided il desired, and as circumstances may require.

The machine continues to operate as has been described until the saw sh has made a complete revolution. During' the movenient ot the tile frames in oscillating backwardly and torwardly, the bell ,ranlr lever comprising' the arm 180 is also oscillated. The :not 179. acting upon the roll178, thus serves to oscillate the lever 168 about its axis 167, thus causing; the cam shoe 172 to move liaclrwardly and forwardly to aslight extent while resting; upon the peripheral surface of the cam 173. The timing' of the parts .is such that as the shoulder 175 of moves toward such shoulder 175 at the instant that the tile 'trames are n'iovingrearwardly. Thus the falling ot' the shoe 172 from the peripheral surface of the cam at the shoulder 175 while the tiles are clear of the saws is assured. rllhe dropping of the cam roll 172 permits the spring 152 by its expansive action to depress the rod 150, thereby carrying' the yoke 148 downwardly, and breakingr the toggles comprising the linlts 189, 143; 140, 144. This movement causes the sleeve with its pawl 147 to move to the lett, carrying' the shaft 171'to the left a distan-ce substantially equal to the space between successive teeth of the group 131. rlhe stop pawl 136 is permitted to drop as the link moves downwardly, such stop pawl then engaging the left hand notch of the series 132 and preventing :tun ther movement ot the shaft 71 to the left. This movement of the shaft 71 carries the brackets 75. 7G, 77, to the lett and thereby moves the bracket arms 79, 80, 81, to the The lingers 82 of these arms which ce between certain of the gears of the ,shaft 89. cause the latter shaft to move to the ett in its hearings, thereby shitting the l nle frames to the lett. a distance sutticient to ent each file for engagement with the next saw to the lett in the corresponding `group. This entire movement takes place while the tile iframes are making a backward and forward reciprocation and while the liles are out. ot' engagement with the saws.

'llhe machine continues to operate, and

cach tile now starts upon a new saw of the series the operation continuing` as above described until cach tooth of such second saw oi" nach group is properly gummed. During such operation the cam shoe 172 again moves up the cam incline 17()l onto the peripheral surface ot the cam 173 and the .sleeve 145 is therebyv moved to the right, thus engagingrl the pawl 147 with the central tooth ot the group 181,v and the stop pawl 136 is again raised. At the same time the pawl 134 is caused to engage with the central tooth ot the group 180. At the completion or" the second saw of each group, the cam shoe 172 again falls trom the shoulder 175, while the lile frames are in rearward position. whereupon the spring 152 again acts to shiit't the shaft 71 a further step to the left.

The operation is then repeated, the tiles now cooperating with the third saw ot each group until the saw shaft has made another compl revolution. l-,Vheu now the cam 2 again drops from the shoulder 175 the shaft 71 is again moved to the left but at this movement the bracket 75 engage-s the lever arm 191 ot the latch member 189, thus disengaging the latter from the pin 138. Spring 187 now acts to move the belt shipper rod 185 tothe left thereby carrying the belt from the fast to the loose pulley and bringing` the machine to rest, the gumming of the entire set of sawshaving thus been completed and the machine being in position for permitting removal of the saw shaft and its replacement by a new shaft as above described.

if at any time during the operation of the machine the operator desires to stop the machine, as for example for renewing the files he may do so by manual actuation of the lever arm 191, and may then draw the saws out of enga-gement with the files by manipulation of the handle 226. Any indiii'idual tile frame may now be swung forwardly to pe-rmit the removal of its file by discngaging its pins 107 from the slots 10i in the bar 103. The frame being swung forwardly, the file may be removed by loosening` the bolt 98 and a new file may be substituted. The frame may again be properly connected to the member 103 merely by moving the pins 107 downwardly into the proper slots 104. Then now the handle '226 is moved rearwardly1 the saws are presented in properv position for the continuance of the operation by reason of the fact that the driving connections between the saw sha-ft and the shaft 56 are not disengaged by such forward movement of the saw shaft. The operation may then continue merely by swinging the lever 193 to the right and thereby moving the belt shipper rod into proper position for starting, without necessitating any manual turning of the saw shaft for bringing the files into engagement with the saw teeth.

lt is thus evident that the machine operates in an automatic manner to complete the gummingof all the saws of the cylin-v der without any manual adjustment of parts during` the operation. As a file is provided for every third saw itl is possible to gum all the saws of the cylinder merely by causing the cylinder to rota-te throughthree complete turns, ,while at the same time the mechanical parts are of such simple character as to permit the machine to be operated by the most unskilled class of labor.

llfhile certain specific arrangements have herein been shown and described as particularly suitable for producing the de! sired relative movement of the several operative Vparts it is to be understood that other and equivalent means well be substituted therefor if it should be found desirable so to do, while it is also contemplated that various rearrangements of the. parts may be made as well as changes in the shapes and proportions of the parte such as may be found desirable in adapting the machine for use under especial circumstances.

llVhat l claim and desire to secure by'Let.- ters Patent of the United States is:

1. A saw gumming machine comprising a longitudinally movable rotary shaft, a plu# rality of independent supports mounted to swing thereon, a file shaft mounted in bearings vin cach support and extending at an angle to said first named shaft, a disc file secured to each file shaft, means for transmitting motion of rotation of said first shaft to `tli-e several file shafts, and means for imoarting intermittent longitudinal movement to said .first shaft.

2. A machine of the class described coinprising a longitudinally movable rotary shaft, a plurality of independent supports mounted thereon, file shafts mounted in bearings in the respective supports. files se cured tothe respective shafts,-means for turning the several [ile shafts in their bearings, and means for moving said first named shaft in an axial direction.

3. A machine of the class described comprising a longitudinally movable, rotary shaft, a series of spaced gears secured to the shaft, a supporting frame suspended upon the shaft between each pair of adjacent gears, a tile shaft journaled in each` frame, means for transmitting movement to each file shaft, means for rotating said first named shaft, and means for moving said' shaft with its gears and supporting frame in an axial direction. Y

et. A machine of the class described comprising means for supporting a saw cylinder, an oscillatory file', means for oscillating said file, means operative intermittently tor shiftingl said ille out of position for engage ment with one saw of a cylinder mounted in said supporting means to position for engagementwith another, and means moving with said file oscillating means for determining actuation of said shifting means.

A machine of the class described comprising means for supporting a saw cylinder. a disk file mounted to oscillate toward and from operative position relatively to saws of said cylinder, a reciprocating bar having connection to the tile supporting means for oscillatingthe latter, cam controlled means for movingthe file bodily in a direction longitudinally of the saw cylinder, said latter means comprising acam follower engaging the peripheral surface of a cam, and means moving with said reciprocating bar for reciprocating said cam follower relatively to the surface of the cam whereby to ensure actuation of said cam follower by the cam at a predetermined time in the oscillation of said file.

6. A machine of the class described comprising a rotary file carrying shaft, means Y for support-ing said shaft to oscillate in a vertical plane and for permitting bodily movement of said shaft in a direction transverse of its length, a cam actuated reciprocating bar, means connectingsaid bar with said shaft carrying means whereby to oscillate the latter, spring actuated means for imparting bodily movement to said shaft in a direction transverse its length means for compressing the spring co-mprising a cam having a dwell portionand an activev portion, and a cam follower, a lever upon which the cam follower issupported, a bell crank lever having one end pivotally connected to said reciprocating bar and having a slot in its other end, and a roller carried by said lever and engaging said slot, the parts being so constructed and arranged as to cause the cam follower to approach the active portion of the cam for actuation thereby during the time that the file vsupporting shaft is retracted from the saw.

7. A machine of the class described comprising means for supporting a saw cylinder, a rotary driven shaft mounted in bearings to extend substantially parallel to the axis of such saw cylinder, said shaft being axially movable, a plurality of file carrying frames suspended from said shaft, a second shaft substantially parallel to said last named shaft, means connecting said shafts for simultaneous longitudinal movement and power actuated means for intermittently moving said second shaft in an axial direction.

8. A machine of the class describedcomprising means for supporting a saw cylinder, saw gumming means arranged for bodily movement longitudinally of saidlcylinder, a shaft-provided withy ratchet teeth,

means for connecting said shaft with saidgum-ming means for simultaneous longituf dinal movement, a pawl engageable-with the ratchet teeth of said shaft, a sleeve mounted upon the shaft and supporting said pawl, and spring means for Vmoving said sleevev whereby tirough said pawl to move'thc shaft longitudinally and thereby -to impart bodily movement of said gumming means.

9. A machineY for gumming the saws of gin saw cylinders comprising bodilymovable gummingmeans and means for imparting bodily movement thereto, said latter means comprising a shaft having `a 'plurality of ratchet teeth therein, a sleeve slidable upon said shaft, a pawl carried by said sleeve and engageable with said teeth,

spring means for moving said sleeve and thereby, through the pawl, moving said shaft, and power driven cam means for alternately compressing and releasing said spring. A l

10. A machine of the class described comprisinglbodily movable gumming means, a shaft having ratchet teeth thereon, means connecting said shaft with the gumming means, a pawl engageable with the ratchet teeth of said shaft, means for supporting said pawl for movement longitudinally of the axis of the shaft, a spring actuated bar, a link connecting said. bar with said pawl carrying means, means for compressing the spring whereby said bar is actuated, and

means for suddenly releasing said spring whereby through said pawl to move the shaft longitudinally ythereby imparting movement to the gumming means.

1l. In a machine ofthe class described, a gumming element arranged forsuccessive engagement with adjacent saws of a saw cylinder and .means for moving said gumming element from one saw to the other comprising a driving pawl, spring means for actuating said pawl, and ay rotating camv for alternately compressing said spring and releasing the same, said cam having an active portion of relatively small angular exent and an inactive portion of relatively great angular extent.

l2. A machine of the class described comprising mean for supportingand rotating a saw cylinder, gumming means arranged for bodily movement longitudinally of the saw cylinder, and means for so ing said gumming means comprising a rotating cam disc turning once for each rotation of the saw cylinder and having an abrupt inwardly descending portion followed l actuated means for oscillating the latter, and l resilient connections Abetween lsaid bar and lfra-me for transmitting movement from the bar to the frame.

14. In a machine of the class described, a

tending substantial-ly parallel to said shaft,

means for bodily moving said bar in afdirection transverse of its length, and indevmovable file carrying frame, a power acpendentmeans connecting each of said file frames to said bar. Y .f

16. Asaw gummmg machine comprising a series of file supporting devices'plvoted 'upon arotating shaft, files carried thereby,`

drive connections between-the shaftand the' several files, means for simultaneously actuating said files for gumming teeth of a plurality of saws, andyme'ans vpermitting each individual supporting device to be moved to inoperative positionindependently of theothers.

17. A saw gumming machine kcomprising a series of file supporting frames ,suspended to'swin vu on a ro`tatin T shaft adisciiile a saw blade, said last named means com-` prising pin and slot connections constructed and arranged to permit the frame Yto be swung out of normal position to present the saw shaft in position for the ready removal and replacement ofthe file.

19. A saw gumming machine comprising a series of file supporting frames,` a normally vertical file shaft carried by each frame, means for securinga file'to each shaft,

' and means Yfor Vmoving the several frames comprising a shaft, a series. of lframe supported` thereby, each ofV said frames being'- whereby to-bring the lilesint'o operative engagement with the sawj the parts being so constructed andv afrrangedas to permit said frames independently to be so moved 'as to cause the respective file shafts to lie in substantiallyf'horizontal planes to permitv the ready attachment or removal of a file.

2O.` A machine of the class described com prising a supporting shaft, a series offfile carrymg vframes suspended therefrom for oscillation about the axis thereof. a bar extending substantially parallel `to Y said shaft, and arranged for oscillation about an axisparallel .to said shaft, a link pivotally connected to each of said file frames, and' ,means for connecting the severalilinks to said barwherebyl oscillation of said bar serves simultaneouslyV to oscillate the file flilames about the" axis of the supporting s aft. f

21. A machine for gumming'gin Vsaws provided with saw gumming means, a bar extendingsubstantially parallel to saidl shaft, Ymeans for`s11pporting'said'barto oscillate about an axis parrallel to said shaft,

power means for oscillating said bar, and resilient: means connecting each of said frames with said bar.

l227A machine forgumming sawsi comprising Aa series of'movable, file carryingv frames,*a har extending longitudinally of said )series andspaced therefrom, said bar being movablein a direction'transverse of said series, a link' pivotalljT connected to j each of said frames, a block slidably mount-i ed'upon'each ofsaid links, a coil spring surrounding each link and bearing at one end against a"corresponding'block and at its other end against an enlargement of the link, and means for connecting the severalv blocks to said ban-.whereby resilientlyf and simultaneously to transmit movement from the bar to the several frames. c

23. A machine of the class describedy comprising a series of movableV file carrying frames, a bar extending longitudinally of said series, said bar having ears projecting therefrom, such earsy having f open slots therein, links pivotally secured to the respective frames, blocks `slidably engaging veach of said links, and pins projecting laterally fromv the several blocksy and arranged for 'engagement with the slots in the `ears projecting from said bar. y I A 24,-., A `machine of the class described comprising a supporting shaft, a plurality offile'carrying frames suspended'therefrom, a

bar suspended to oscillate about an axis parallel to that of the shaft, links pivotally secured tothe respective file frames, blocks slidably mounted upon` each of saidlinks,

said blocks having pins projecting laterally from either side thereof, coil yspringsv vsurrounding the respective links and bearingk at one end against the corresponding blockand at the other against i' an enlargedv por:

tion ofthe link and pairs ofY slotted ears projecting fromy the bar, said ears being Y spaced for vthe reception of' thefrespective blocks therebetween and having open ended slots forthe reception of the respective pins carried by the several blocks.l j Y 25. A machine for gumming gin saws comprisinga series of file carrying frames andk means'for synchronously moving said frames comprising a barV arranged for reciproca tion in a path substantially parallelto'said series of frames, a bararranged to move in `a direction transverse of such series, bell crank' leversl and connecting rods for connectmgsaid bars whereby to `transform longitudinal movement of the iirstvbar into transverse movement of the second'banand means for connecting each of thek frames'` of the series to said secondbar for simultane- :ous movement therewith'. Y Y 26. Mechanism of the class described'comprising a series of file supportingframes suspended for oscillation from lrotating shaft, a bar ymounted to oscillate about an 

